Question

Mr.Bajaj needs to replace the batteries in 20 toys.Each toy needs 4batteries. The batteries sold in packets of 16. How many packets of batteriesdoes Mr.Bajaj need to buy​

Answer 1

Given :

• Number of toys = 20

• Number of batteries used in 1 toy = 4

• Batteries sold in packets = 16

To Find :

• Number of batteries required

$\large \red{ \underline{ \underline{ \green{ \rm \: solution : }}}}$

$\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \rightarrow$ total number of batteries required

= number of batteries in 1 toy × total number of toys

$\implies$ 4 × 20

$\therefore$ total number of batteries required = 80

$\large \blue{ \underline{ \pink{ \rm \: now : }}}$

• Let number of batteries required be = x

$\bigstar$ x × batteries in packet = total batteries required

$\implies$ x × 16 = 80

$\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \rightarrow$ On transposing the terms :

$\implies \red{\rm \: x = \dfrac{80}{16} }$

$\therefore \large \green{\rm \: \boxed{ \orange{ x = 5}}}$

$\: \: \: \bigstar$ Mr. Bajaj needs to buy 5 packets of batteries.